Abstract
Massive X-ray binary pulsars have often evolved early-type companion stars which emanate strong stellar winds. X-rays emitted from the accreting neutron star irradiate and ionize the surrounding stellar wind, thus forrriing a photoionized sphere surrounding the neutron star. The photoionization structure of matter surrounding the neutron star was calculated by Hatchett and McCray (1977) and McCray et al. (1984), for Cen X-3 and Vela X-l respectively.
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Nagase, F. (1998). Photoionized Plasmas in X-Ray Binary Pulsars: ASCA Observations. In: Koyama, K., Kitamoto, S., Itoh, M. (eds) The Hot Universe. International Astronomical Union / Union Astronomique Internationale, vol 188. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4970-9_23
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DOI: https://doi.org/10.1007/978-94-011-4970-9_23
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